Add some UTF-8 utility functions and use them to prevent the width limit

on formats from splitting UTF-8 characters improperly.

1 files changed, 8 insertions, 5 deletions

diff --git a/format.c b/format.c
index f462a2a5..7c8ce779 100644
--- a/format.c
+++ b/format.c
@@ -194,10 +194,10 @@ int
 format_replace(struct format_tree *ft, const char *key, size_t keylen,
     char **buf, size_t *len, size_t *off)
 {
-	char		*copy, *copy0, *endptr, *ptr, *saved;
+	char		*copy, *copy0, *endptr, *ptr, *saved, *trimmed;
 	const char	*value;
 	size_t		 valuelen;
-	u_long		 limit = ULONG_MAX;
+	u_long		 limit = 0;
 
 	/* Make a copy of the key. */
 	copy0 = copy = xmalloc(keylen + 1);
@@ -256,11 +256,14 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
 			value = "";
 		saved = NULL;
 	}
-	valuelen = strlen(value);
 
 	/* Truncate the value if needed. */
-	if (valuelen > limit)
-		valuelen = limit;
+	if (limit != 0) {
+		value = trimmed = utf8_trimcstr(value, limit);
+		free(saved);
+		saved = trimmed;
+	}
+	valuelen = strlen(value);
 
 	/* Expand the buffer and copy in the value. */
 	while (*len - *off < valuelen + 1) {